C. The marble moved 30 cm north in 6 seconds.
This gives a scientific or correct value of object in motion among all other options.
<em>-</em><em> </em><em>BRAINLIEST</em><em> answerer</em>
The formula is=1/2(m x v^2)
so = 1/2*(0.05)*(310)^2
ans is =2402.5 joules
Its true hopefully this helps you.